creation_sourcecode: {{
    "language": "Solidity",
    "sources": {
      "contracts/WalletSimple.sol": {
        "content": "// SPDX-License-Identifier: Apache-2.0\npragma solidity 0.8.10;\nimport './TransferHelper.sol';\nimport './ERC20Interface.sol';\nimport './IForwarder.sol';\n\n/** ERC721, ERC1155 imports */\nimport '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';\nimport '@openzeppelin/contracts/token/ERC1155/utils/ERC1155Receiver.sol';\n\n/**\n *\n * WalletSimple\n * ============\n *\n * Basic multi-signer wallet designed for use in a co-signing environment where 2 signatures are required to move funds.\n * Typically used in a 2-of-3 signing configuration. Uses ecrecover to allow for 2 signatures in a single transaction.\n *\n * The first signature is created on the operation hash (see Data Formats) and passed to sendMultiSig/sendMultiSigToken\n * The signer is determined by verifyMultiSig().\n *\n * The second signature is created by the submitter of the transaction and determined by msg.signer.\n *\n * Data Formats\n * ============\n *\n * The signature is created with ethereumjs-util.ecsign(operationHash).\n * Like the eth_sign RPC call, it packs the values as a 65-byte array of [r, s, v].\n * Unlike eth_sign, the message is not prefixed.\n *\n * The operationHash the result of keccak256(prefix, toAddress, value, data, expireTime).\n * For ether transactions, `prefix` is \"ETHER\".\n * For token transaction, `prefix` is \"ERC20\" and `data` is the tokenContractAddress.\n *\n *\n */\ncontract WalletSimple is IERC721Receiver, ERC1155Receiver {\n  // Events\n  event Deposited(address from, uint256 value, bytes data);\n  event SafeModeActivated(address msgSender);\n  event Transacted(\n    address msgSender, // Address of the sender of the message initiating the transaction\n    address otherSigner, // Address of the signer (second signature) used to initiate the transaction\n    bytes32 operation, // Operation hash (see Data Formats)\n    address toAddress, // The address the transaction was sent to\n    uint256 value, // Amount of Wei sent to the address\n    bytes data // Data sent when invoking the transaction\n  );\n\n  event BatchTransfer(address sender, address recipient, uint256 value);\n  // this event shows the other signer and the operation hash that they signed\n  // specific batch transfer events are emitted in Batcher\n  event BatchTransacted(\n    address msgSender, // Address of the sender of the message initiating the transaction\n    address otherSigner, // Address of the signer (second signature) used to initiate the transaction\n    bytes32 operation // Operation hash (see Data Formats)\n  );\n\n  // Public fields\n  mapping(address => bool) public signers; // The addresses that can co-sign transactions on the wallet\n  bool public safeMode = false; // When active, wallet may only send to signer addresses\n  bool public initialized = false; // True if the contract has been initialized\n\n  // Internal fields\n  uint256 private constant MAX_SEQUENCE_ID_INCREASE = 10000;\n  uint256 constant SEQUENCE_ID_WINDOW_SIZE = 10;\n  uint256[SEQUENCE_ID_WINDOW_SIZE] recentSequenceIds;\n\n  /**\n   * Set up a simple multi-sig wallet by specifying the signers allowed to be used on this wallet.\n   * 2 signers will be required to send a transaction from this wallet.\n   * Note: The sender is NOT automatically added to the list of signers.\n   * Signers CANNOT be changed once they are set\n   *\n   * @param allowedSigners An array of signers on the wallet\n   */\n  function init(address[] calldata allowedSigners) external onlyUninitialized {\n    require(allowedSigners.length == 3, 'Invalid number of signers');\n\n    for (uint8 i = 0; i < allowedSigners.length; i++) {\n      require(allowedSigners[i] != address(0), 'Invalid signer');\n      signers[allowedSigners[i]] = true;\n    }\n\n    initialized = true;\n  }\n\n  /**\n   * Get the network identifier that signers must sign over\n   * This provides protection signatures being replayed on other chains\n   * This must be a virtual function because chain-specific contracts will need\n   *    to override with their own network ids. It also can't be a field\n   *    to allow this contract to be used by proxy with delegatecall, which will\n   *    not pick up on state variables\n   */\n  function getNetworkId() internal virtual pure returns (string memory) {\n    return 'ETHER';\n  }\n\n  /**\n   * Get the network identifier that signers must sign over for token transfers\n   * This provides protection signatures being replayed on other chains\n   * This must be a virtual function because chain-specific contracts will need\n   *    to override with their own network ids. It also can't be a field\n   *    to allow this contract to be used by proxy with delegatecall, which will\n   *    not pick up on state variables\n   */\n  function getTokenNetworkId() internal virtual pure returns (string memory) {\n    return 'ERC20';\n  }\n\n  /**\n   * Get the network identifier that signers must sign over for batch transfers\n   * This provides protection signatures being replayed on other chains\n   * This must be a virtual function because chain-specific contracts will need\n   *    to override with their own network ids. It also can't be a field\n   *    to allow this contract to be used by proxy with delegatecall, which will\n   *    not pick up on state variables\n   */\n  function getBatchNetworkId() internal virtual pure returns (string memory) {\n    return 'ETHER-Batch';\n  }\n\n  /**\n   * Determine if an address is a signer on this wallet\n   * @param signer address to check\n   * returns boolean indicating whether address is signer or not\n   */\n  function isSigner(address signer) public view returns (bool) {\n    return signers[signer];\n  }\n\n  /**\n   * Modifier that will execute internal code block only if the sender is an authorized signer on this wallet\n   */\n  modifier onlySigner {\n    require(isSigner(msg.sender), 'Non-signer in onlySigner method');\n    _;\n  }\n\n  /**\n   * Modifier that will execute internal code block only if the contract has not been initialized yet\n   */\n  modifier onlyUninitialized {\n    require(!initialized, 'Contract already initialized');\n    _;\n  }\n\n  /**\n   * Gets called when a transaction is received with data that does not match any other method\n   */\n  fallback() external payable {\n    if (msg.value > 0) {\n      // Fire deposited event if we are receiving funds\n      emit Deposited(msg.sender, msg.value, msg.data);\n    }\n  }\n\n  /**\n   * Gets called when a transaction is received with ether and no data\n   */\n  receive() external payable {\n    if (msg.value > 0) {\n      // Fire deposited event if we are receiving funds\n      // message data is always empty for receive. If there is data it is sent to fallback function.\n      emit Deposited(msg.sender, msg.value, '');\n    }\n  }\n\n  /**\n   * Execute a multi-signature transaction from this wallet using 2 signers: one from msg.sender and the other from ecrecover.\n   * Sequence IDs are numbers starting from 1. They are used to prevent replay attacks and may not be repeated.\n   *\n   * @param toAddress the destination address to send an outgoing transaction\n   * @param value the amount in Wei to be sent\n   * @param data the data to send to the toAddress when invoking the transaction\n   * @param expireTime the number of seconds since 1970 for which this transaction is valid\n   * @param sequenceId the unique sequence id obtainable from getNextSequenceId\n   * @param signature see Data Formats\n   */\n  function sendMultiSig(\n    address toAddress,\n    uint256 value,\n    bytes calldata data,\n    uint256 expireTime,\n    uint256 sequenceId,\n    bytes calldata signature\n  ) external onlySigner {\n    // Verify the other signer\n    bytes32 operationHash = keccak256(\n      abi.encodePacked(\n        getNetworkId(),\n        toAddress,\n        value,\n        data,\n        expireTime,\n        sequenceId\n      )\n    );\n\n    address otherSigner = verifyMultiSig(\n      toAddress,\n      operationHash,\n      signature,\n      expireTime,\n      sequenceId\n    );\n\n    // Success, send the transaction\n    (bool success, ) = toAddress.call{ value: value }(data);\n    require(success, 'Call execution failed');\n\n    emit Transacted(\n      msg.sender,\n      otherSigner,\n      operationHash,\n      toAddress,\n      value,\n      data\n    );\n  }\n\n  /**\n   * Execute a batched multi-signature transaction from this wallet using 2 signers: one from msg.sender and the other from ecrecover.\n   * Sequence IDs are numbers starting from 1. They are used to prevent replay attacks and may not be repeated.\n   * The recipients and values to send are encoded in two arrays, where for index i, recipients[i] will be sent values[i].\n   *\n   * @param recipients The list of recipients to send to\n   * @param values The list of values to send to\n   * @param expireTime the number of seconds since 1970 for which this transaction is valid\n   * @param sequenceId the unique sequence id obtainable from getNextSequenceId\n   * @param signature see Data Formats\n   */\n  function sendMultiSigBatch(\n    address[] calldata recipients,\n    uint256[] calldata values,\n    uint256 expireTime,\n    uint256 sequenceId,\n    bytes calldata signature\n  ) external onlySigner {\n    require(recipients.length != 0, 'Not enough recipients');\n    require(\n      recipients.length == values.length,\n      'Unequal recipients and values'\n    );\n    require(recipients.length < 256, 'Too many recipients, max 255');\n\n    // Verify the other signer\n    bytes32 operationHash = keccak256(\n      abi.encodePacked(\n        getBatchNetworkId(),\n        recipients,\n        values,\n        expireTime,\n        sequenceId\n      )\n    );\n\n    // the first parameter (toAddress) is used to ensure transactions in safe mode only go to a signer\n    // if in safe mode, we should use normal sendMultiSig to recover, so this check will always fail if in safe mode\n    require(!safeMode, 'Batch in safe mode');\n    address otherSigner = verifyMultiSig(\n      address(0x0),\n      operationHash,\n      signature,\n      expireTime,\n      sequenceId\n    );\n\n    batchTransfer(recipients, values);\n    emit BatchTransacted(msg.sender, otherSigner, operationHash);\n  }\n\n  /**\n   * Transfer funds in a batch to each of recipients\n   * @param recipients The list of recipients to send to\n   * @param values The list of values to send to recipients.\n   *  The recipient with index i in recipients array will be sent values[i].\n   *  Thus, recipients and values must be the same length\n   */\n  function batchTransfer(\n    address[] calldata recipients,\n    uint256[] calldata values\n  ) internal {\n    for (uint256 i = 0; i < recipients.length; i++) {\n      require(address(this).balance >= values[i], 'Insufficient funds');\n\n      (bool success, ) = recipients[i].call{ value: values[i] }('');\n      require(success, 'Call failed');\n\n      emit BatchTransfer(msg.sender, recipients[i], values[i]);\n    }\n  }\n\n  /**\n   * Execute a multi-signature token transfer from this wallet using 2 signers: one from msg.sender and the other from ecrecover.\n   * Sequence IDs are numbers starting from 1. They are used to prevent replay attacks and may not be repeated.\n   *\n   * @param toAddress the destination address to send an outgoing transaction\n   * @param value the amount in tokens to be sent\n   * @param tokenContractAddress the address of the erc20 token contract\n   * @param expireTime the number of seconds since 1970 for which this transaction is valid\n   * @param sequenceId the unique sequence id obtainable from getNextSequenceId\n   * @param signature see Data Formats\n   */\n  function sendMultiSigToken(\n    address toAddress,\n    uint256 value,\n    address tokenContractAddress,\n    uint256 expireTime,\n    uint256 sequenceId,\n    bytes calldata signature\n  ) external onlySigner {\n    // Verify the other signer\n    bytes32 operationHash = keccak256(\n      abi.encodePacked(\n        getTokenNetworkId(),\n        toAddress,\n        value,\n        tokenContractAddress,\n        expireTime,\n        sequenceId\n      )\n    );\n\n    verifyMultiSig(toAddress, operationHash, signature, expireTime, sequenceId);\n\n    TransferHelper.safeTransfer(tokenContractAddress, toAddress, value);\n  }\n\n  /**\n   * Execute a token flush from one of the forwarder addresses. This transfer needs only a single signature and can be done by any signer\n   *\n   * @param forwarderAddress the address of the forwarder address to flush the tokens from\n   * @param tokenContractAddress the address of the erc20 token contract\n   */\n  function flushForwarderTokens(\n    address payable forwarderAddress,\n    address tokenContractAddress\n  ) external onlySigner {\n    IForwarder forwarder = IForwarder(forwarderAddress);\n    forwarder.flushTokens(tokenContractAddress);\n  }\n\n  /**\n   * Execute a ERC721 token flush from one of the forwarder addresses. This transfer needs only a single signature and can be done by any signer\n   *\n   * @param forwarderAddress the address of the forwarder address to flush the tokens from\n   * @param tokenContractAddress the address of the erc20 token contract\n   */\n  function flushERC721ForwarderTokens(\n    address payable forwarderAddress,\n    address tokenContractAddress,\n    uint256 tokenId\n  ) external onlySigner {\n    IForwarder forwarder = IForwarder(forwarderAddress);\n    forwarder.flushERC721Token(tokenContractAddress, tokenId);\n  }\n\n  /**\n   * Execute a ERC1155 batch token flush from one of the forwarder addresses.\n   * This transfer needs only a single signature and can be done by any signer.\n   *\n   * @param forwarderAddress the address of the forwarder address to flush the tokens from\n   * @param tokenContractAddress the address of the erc1155 token contract\n   */\n  function batchFlushERC1155ForwarderTokens(\n    address payable forwarderAddress,\n    address tokenContractAddress,\n    uint256[] calldata tokenIds\n  ) external onlySigner {\n    IForwarder forwarder = IForwarder(forwarderAddress);\n    forwarder.batchFlushERC1155Tokens(tokenContractAddress, tokenIds);\n  }\n\n  /**\n   * Execute a ERC1155 token flush from one of the forwarder addresses.\n   * This transfer needs only a single signature and can be done by any signer.\n   *\n   * @param forwarderAddress the address of the forwarder address to flush the tokens from\n   * @param tokenContractAddress the address of the erc1155 token contract\n   * @param tokenId the token id associated with the ERC1155\n   */\n  function flushERC1155ForwarderTokens(\n    address payable forwarderAddress,\n    address tokenContractAddress,\n    uint256 tokenId\n  ) external onlySigner {\n    IForwarder forwarder = IForwarder(forwarderAddress);\n    forwarder.flushERC1155Tokens(tokenContractAddress, tokenId);\n  }\n\n  /**\n   * Sets the autoflush 721 parameter on the forwarder.\n   *\n   * @param forwarderAddress the address of the forwarder to toggle.\n   * @param autoFlush whether to autoflush erc721 tokens\n   */\n  function setAutoFlush721(address forwarderAddress, bool autoFlush)\n    external\n    onlySigner\n  {\n    IForwarder forwarder = IForwarder(forwarderAddress);\n    forwarder.setAutoFlush721(autoFlush);\n  }\n\n  /**\n   * Sets the autoflush 721 parameter on the forwarder.\n   *\n   * @param forwarderAddress the address of the forwarder to toggle.\n   * @param autoFlush whether to autoflush erc1155 tokens\n   */\n  function setAutoFlush1155(address forwarderAddress, bool autoFlush)\n    external\n    onlySigner\n  {\n    IForwarder forwarder = IForwarder(forwarderAddress);\n    forwarder.setAutoFlush1155(autoFlush);\n  }\n\n  /**\n   * Do common multisig verification for both eth sends and erc20token transfers\n   *\n   * @param toAddress the destination address to send an outgoing transaction\n   * @param operationHash see Data Formats\n   * @param signature see Data Formats\n   * @param expireTime the number of seconds since 1970 for which this transaction is valid\n   * @param sequenceId the unique sequence id obtainable from getNextSequenceId\n   * returns address that has created the signature\n   */\n  function verifyMultiSig(\n    address toAddress,\n    bytes32 operationHash,\n    bytes calldata signature,\n    uint256 expireTime,\n    uint256 sequenceId\n  ) private returns (address) {\n    address otherSigner = recoverAddressFromSignature(operationHash, signature);\n\n    // Verify if we are in safe mode. In safe mode, the wallet can only send to signers\n    require(!safeMode || isSigner(toAddress), 'External transfer in safe mode');\n\n    // Verify that the transaction has not expired\n    require(expireTime >= block.timestamp, 'Transaction expired');\n\n    // Try to insert the sequence ID. Will revert if the sequence id was invalid\n    tryInsertSequenceId(sequenceId);\n\n    require(isSigner(otherSigner), 'Invalid signer');\n\n    require(otherSigner != msg.sender, 'Signers cannot be equal');\n\n    return otherSigner;\n  }\n\n  /**\n   * ERC721 standard callback function for when a ERC721 is transfered.\n   *\n   * @param _operator The address of the nft contract\n   * @param _from The address of the sender\n   * @param _tokenId The token id of the nft\n   * @param _data Additional data with no specified format, sent in call to `_to`\n   */\n  function onERC721Received(\n    address _operator,\n    address _from,\n    uint256 _tokenId,\n    bytes memory _data\n  ) external virtual override returns (bytes4) {\n    return this.onERC721Received.selector;\n  }\n\n  /**\n   * @inheritdoc IERC1155Receiver\n   */\n  function onERC1155Received(\n    address _operator,\n    address _from,\n    uint256 id,\n    uint256 value,\n    bytes calldata data\n  ) external virtual override returns (bytes4) {\n    return this.onERC1155Received.selector;\n  }\n\n  /**\n   * @inheritdoc IERC1155Receiver\n   */\n  function onERC1155BatchReceived(\n    address _operator,\n    address _from,\n    uint256[] calldata ids,\n    uint256[] calldata values,\n    bytes calldata data\n  ) external virtual override returns (bytes4) {\n    return this.onERC1155BatchReceived.selector;\n  }\n\n  /**\n   * Irrevocably puts contract into safe mode. When in this mode, transactions may only be sent to signing addresses.\n   */\n  function activateSafeMode() external onlySigner {\n    safeMode = true;\n    emit SafeModeActivated(msg.sender);\n  }\n\n  /**\n   * Gets signer's address using ecrecover\n   * @param operationHash see Data Formats\n   * @param signature see Data Formats\n   * returns address recovered from the signature\n   */\n  function recoverAddressFromSignature(\n    bytes32 operationHash,\n    bytes memory signature\n  ) private pure returns (address) {\n    require(signature.length == 65, 'Invalid signature - wrong length');\n\n    // We need to unpack the signature, which is given as an array of 65 bytes (like eth.sign)\n    bytes32 r;\n    bytes32 s;\n    uint8 v;\n\n    // solhint-disable-next-line\n    assembly {\n      r := mload(add(signature, 32))\n      s := mload(add(signature, 64))\n      v := and(mload(add(signature, 65)), 255)\n    }\n    if (v < 27) {\n      v += 27; // Ethereum versions are 27 or 28 as opposed to 0 or 1 which is submitted by some signing libs\n    }\n\n    // protect against signature malleability\n    // S value must be in the lower half orader\n    // reference: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/051d340171a93a3d401aaaea46b4b62fa81e5d7c/contracts/cryptography/ECDSA.sol#L53\n    require(\n      uint256(s) <=\n        0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,\n      \"ECDSA: invalid signature 's' value\"\n    );\n\n    // note that this returns 0 if the signature is invalid\n    // Since 0x0 can never be a signer, when the recovered signer address\n    // is checked against our signer list, that 0x0 will cause an invalid signer failure\n    return ecrecover(operationHash, v, r, s);\n  }\n\n  /**\n   * Verify that the sequence id has not been used before and inserts it. Throws if the sequence ID was not accepted.\n   * We collect a window of up to 10 recent sequence ids, and allow any sequence id that is not in the window and\n   * greater than the minimum element in the window.\n   * @param sequenceId to insert into array of stored ids\n   */\n  function tryInsertSequenceId(uint256 sequenceId) private onlySigner {\n    // Keep a pointer to the lowest value element in the window\n    uint256 lowestValueIndex = 0;\n    // fetch recentSequenceIds into memory for function context to avoid unnecessary sloads\n\n\n      uint256[SEQUENCE_ID_WINDOW_SIZE] memory _recentSequenceIds\n     = recentSequenceIds;\n    for (uint256 i = 0; i < SEQUENCE_ID_WINDOW_SIZE; i++) {\n      require(_recentSequenceIds[i] != sequenceId, 'Sequence ID already used');\n\n      if (_recentSequenceIds[i] < _recentSequenceIds[lowestValueIndex]) {\n        lowestValueIndex = i;\n      }\n    }\n\n    // The sequence ID being used is lower than the lowest value in the window\n    // so we cannot accept it as it may have been used before\n    require(\n      sequenceId > _recentSequenceIds[lowestValueIndex],\n      'Sequence ID below window'\n    );\n\n    // Block sequence IDs which are much higher than the lowest value\n    // This prevents people blocking the contract by using very large sequence IDs quickly\n    require(\n      sequenceId <=\n        (_recentSequenceIds[lowestValueIndex] + MAX_SEQUENCE_ID_INCREASE),\n      'Sequence ID above maximum'\n    );\n\n    recentSequenceIds[lowestValueIndex] = sequenceId;\n  }\n\n  /**\n   * Gets the next available sequence ID for signing when using executeAndConfirm\n   * returns the sequenceId one higher than the highest currently stored\n   */\n  function getNextSequenceId() external view returns (uint256) {\n    uint256 highestSequenceId = 0;\n    for (uint256 i = 0; i < SEQUENCE_ID_WINDOW_SIZE; i++) {\n      if (recentSequenceIds[i] > highestSequenceId) {\n        highestSequenceId = recentSequenceIds[i];\n      }\n    }\n    return highestSequenceId + 1;\n  }\n}\n"
      },
      "contracts/TransferHelper.sol": {
        "content": "// SPDX-License-Identifier: GPL-3.0-or-later\n// source: https://github.com/Uniswap/solidity-lib/blob/master/contracts/libraries/TransferHelper.sol\npragma solidity 0.8.10;\n\nimport '@openzeppelin/contracts/utils/Address.sol';\n\n// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false\nlibrary TransferHelper {\n  function safeTransfer(\n    address token,\n    address to,\n    uint256 value\n  ) internal {\n    // bytes4(keccak256(bytes('transfer(address,uint256)')));\n    (bool success, bytes memory data) = token.call(\n      abi.encodeWithSelector(0xa9059cbb, to, value)\n    );\n    require(\n      success && (data.length == 0 || abi.decode(data, (bool))),\n      'TransferHelper::safeTransfer: transfer failed'\n    );\n  }\n\n  function safeTransferFrom(\n    address token,\n    address from,\n    address to,\n    uint256 value\n  ) internal {\n    // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));\n    (bool success, bytes memory returndata) = token.call(\n      abi.encodeWithSelector(0x23b872dd, from, to, value)\n    );\n    Address.verifyCallResult(\n      success,\n      returndata,\n      'TransferHelper::transferFrom: transferFrom failed'\n    );\n  }\n}\n"
      },
      "contracts/ERC20Interface.sol": {
        "content": "// SPDX-License-Identifier: UNLICENSED\npragma solidity 0.8.10;\n\n/**\n * Contract that exposes the needed erc20 token functions\n */\n\nabstract contract ERC20Interface {\n  // Send _value amount of tokens to address _to\n  function transfer(address _to, uint256 _value)\n    public\n    virtual\n    returns (bool success);\n\n  // Get the account balance of another account with address _owner\n  function balanceOf(address _owner)\n    public\n    virtual\n    view\n    returns (uint256 balance);\n}\n"
      },
      "contracts/IForwarder.sol": {
        "content": "pragma solidity ^0.8.0;\n\nimport '@openzeppelin/contracts/utils/introspection/IERC165.sol';\n\ninterface IForwarder is IERC165 {\n  /**\n   * Sets the autoflush721 parameter.\n   *\n   * @param autoFlush whether to autoflush erc721 tokens\n   */\n  function setAutoFlush721(bool autoFlush) external;\n\n  /**\n   * Sets the autoflush1155 parameter.\n   *\n   * @param autoFlush whether to autoflush erc1155 tokens\n   */\n  function setAutoFlush1155(bool autoFlush) external;\n\n  /**\n   * Execute a token transfer of the full balance from the forwarder token to the parent address\n   *\n   * @param tokenContractAddress the address of the erc20 token contract\n   */\n  function flushTokens(address tokenContractAddress) external;\n\n  /**\n   * Execute a nft transfer from the forwarder to the parent address\n   *\n   * @param tokenContractAddress the address of the ERC721 NFT contract\n   * @param tokenId The token id of the nft\n   */\n  function flushERC721Token(address tokenContractAddress, uint256 tokenId)\n    external;\n\n  /**\n   * Execute a nft transfer from the forwarder to the parent address.\n   *\n   * @param tokenContractAddress the address of the ERC1155 NFT contract\n   * @param tokenId The token id of the nft\n   */\n  function flushERC1155Tokens(address tokenContractAddress, uint256 tokenId)\n    external;\n\n  /**\n   * Execute a batch nft transfer from the forwarder to the parent address.\n   *\n   * @param tokenContractAddress the address of the ERC1155 NFT contract\n   * @param tokenIds The token ids of the nfts\n   */\n  function batchFlushERC1155Tokens(\n    address tokenContractAddress,\n    uint256[] calldata tokenIds\n  ) external;\n}\n"
      },
      "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @title ERC721 token receiver interface\n * @dev Interface for any contract that wants to support safeTransfers\n * from ERC721 asset contracts.\n */\ninterface IERC721Receiver {\n    /**\n     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}\n     * by `operator` from `from`, this function is called.\n     *\n     * It must return its Solidity selector to confirm the token transfer.\n     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.\n     *\n     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.\n     */\n    function onERC721Received(\n        address operator,\n        address from,\n        uint256 tokenId,\n        bytes calldata data\n    ) external returns (bytes4);\n}\n"
      },
      "@openzeppelin/contracts/token/ERC1155/utils/ERC1155Receiver.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC1155/utils/ERC1155Receiver.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC1155Receiver.sol\";\nimport \"../../../utils/introspection/ERC165.sol\";\n\n/**\n * @dev _Available since v3.1._\n */\nabstract contract ERC1155Receiver is ERC165, IERC1155Receiver {\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {\n        return interfaceId == type(IERC1155Receiver).interfaceId || super.supportsInterface(interfaceId);\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/Address.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize, which returns 0 for contracts in\n        // construction, since the code is only stored at the end of the\n        // constructor execution.\n\n        uint256 size;\n        assembly {\n            size := extcodesize(account)\n        }\n        return size > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/introspection/IERC165.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165 {\n    /**\n     * @dev Returns true if this contract implements the interface defined by\n     * `interfaceId`. See the corresponding\n     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n     * to learn more about how these ids are created.\n     *\n     * This function call must use less than 30 000 gas.\n     */\n    function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n"
      },
      "@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155Receiver.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../../utils/introspection/IERC165.sol\";\n\n/**\n * @dev _Available since v3.1._\n */\ninterface IERC1155Receiver is IERC165 {\n    /**\n        @dev Handles the receipt of a single ERC1155 token type. This function is\n        called at the end of a `safeTransferFrom` after the balance has been updated.\n        To accept the transfer, this must return\n        `bytes4(keccak256(\"onERC1155Received(address,address,uint256,uint256,bytes)\"))`\n        (i.e. 0xf23a6e61, or its own function selector).\n        @param operator The address which initiated the transfer (i.e. msg.sender)\n        @param from The address which previously owned the token\n        @param id The ID of the token being transferred\n        @param value The amount of tokens being transferred\n        @param data Additional data with no specified format\n        @return `bytes4(keccak256(\"onERC1155Received(address,address,uint256,uint256,bytes)\"))` if transfer is allowed\n    */\n    function onERC1155Received(\n        address operator,\n        address from,\n        uint256 id,\n        uint256 value,\n        bytes calldata data\n    ) external returns (bytes4);\n\n    /**\n        @dev Handles the receipt of a multiple ERC1155 token types. This function\n        is called at the end of a `safeBatchTransferFrom` after the balances have\n        been updated. To accept the transfer(s), this must return\n        `bytes4(keccak256(\"onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)\"))`\n        (i.e. 0xbc197c81, or its own function selector).\n        @param operator The address which initiated the batch transfer (i.e. msg.sender)\n        @param from The address which previously owned the token\n        @param ids An array containing ids of each token being transferred (order and length must match values array)\n        @param values An array containing amounts of each token being transferred (order and length must match ids array)\n        @param data Additional data with no specified format\n        @return `bytes4(keccak256(\"onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)\"))` if transfer is allowed\n    */\n    function onERC1155BatchReceived(\n        address operator,\n        address from,\n        uint256[] calldata ids,\n        uint256[] calldata values,\n        bytes calldata data\n    ) external returns (bytes4);\n}\n"
      },
      "@openzeppelin/contracts/utils/introspection/ERC165.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC165.sol\";\n\n/**\n * @dev Implementation of the {IERC165} interface.\n *\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\n * for the additional interface id that will be supported. For example:\n *\n * ```solidity\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\n * }\n * ```\n *\n * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.\n */\nabstract contract ERC165 is IERC165 {\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n        return interfaceId == type(IERC165).interfaceId;\n    }\n}\n"
      }
    },
    "settings": {
      "optimizer": {
        "enabled": false,
        "runs": 200
      },
      "outputSelection": {
        "*": {
          "*": [
            "evm.bytecode",
            "evm.deployedBytecode",
            "devdoc",
            "userdoc",
            "metadata",
            "abi"
          ]
        }
      },
      "libraries": {}
    }
  }}